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After a near disastrous visit to a historical park hampered by overzealous security and a bus that threatens to destroy itself at any moment, tension between the teachers at Springfield Elementary School, led by Edna Krabappel (voice of Marcia Wallace) and principal Seymour Skinner) (voice of Harry Shearer), reaches a fever pitch, and some believe the teachers will go on strike. This is awful news for star student Lisa Simpson (voice of Yeardley Smith), but her brother, Bart (voice of Nancy Cartwright), welcomes a strike, and begins plotting ways to square Krabappel off against Skinner. Bart's tactics work, and soon the towns' parents are forced to look after their children's education; after the Springfield Parent Teacher Organization is unable to persuade the two sides to compromise, they round up volunteers from the neighborhood to teach classes in the meantime. Not only is Bart unhappy to be back at school, but he learns to his dismay that his mother, Marge (voice of Julie Kavner), will be his teacher for the meantime, while Lisa's new instructor has to call off class after his beard gets tangled in the pencil sharpener. Bart, finally realizing the downside of a teachers' strike, decides since he helped tear labor and management apart, he must now help bring them together. "The PTA Disbands" first aired on April 16, 1995.